Steam boiler



June 7, 1927.

- L63L344. w, SIEGERIST STEAM BOILER Filed Aug. 4, 1925 WALTER EiEGERIsT ATTORNEY unirse Sterns WALTER isnennrsnlor sr. Louis; ivrrssonnr Assrsnon To HEINE BoILEn COMPANY,

, 0E s'r. LOUIS, Missounr, A con'ronnron orl rlissomar;l

application mea Augusta; 1923.V sriai no. 65545711.

This invention relates to steam boilers-ot the type that comprise water-tubes, inclined slightly to the horizontal, Aand upright battles 'arranged transversely of sa'id tubes in such.

a way asy to cause the gases-:to flow cross-fw wise or' the tubes, in travelmgfrom thecom- 'i *ile 5 that-extends Vparallel or substantially f. Ybustion chamber of the boiler'tothe gas outchamber arranged below said'tubes and@ f escape lfrom the boiler. The gas outlet flue fC isarranged at the rear end of theboiler, preferably with v'itsinlet endl positioned in alignment with lthe space between two tube let. y y The object otmy invention ris to provide an exceptionally elncient boiler of the general `rtype referred to' thatl has a relatively large combustion chamber which byfthe flue through whichthegases escape l from theboigler, .anda tortu'ouspassageway through which the gases flow transversely ,is not obstructed of the tubes numerous times in escaping 'from thelv combustion chamber.

Thergineo'flthe drawings is a Vvertical sectional view of atwater tube boiler constructed in accordance with'my irn'fention.`

A Referring to the (:lrawings` A and A desigy ,nate twobanksi'oliwater-tubes arranged in superimposed relation and inclined upwardly slightlyy with Vrespect'lto :the frontwallv of theV boiler, QB designates a combustion designates a llue through .Jwhich the gases banks, and battles are provided for causing the gasesto make four transverse'passes Y across y the tubes Aof the uppery bank, in traveling from 'the 'combustion chamber B to the gas outlet flue C, thereby producing a long, tortuous passageway for the gases in .which the heat of the gases will be efectively absorbed by the boiler tubes. In the form of my invention herein illustrated a front baffle lis arrangedtransversely otA the tubes of the upper bank in opposed relation to the front wall of theboiler setting and disposedat such an angle to saine as to l produce a iirst 11p-pass that-is contracted at its upper end, a rear battle 2 is arranged transversely of the tubes `of the upper bank in opposed relation tothe rear wallolj' the boiler setting and disposed at such an angle t0 same as' to produce a final down-pass that is contracted at its lower end, and a center baille 3 is arranged transversely of the'boiler at a point substantially midway the front andy rear battles so `as to produce two intermediate passes, said middle baille 3 extendupper bank.

the boiler and `transverselyfdisposed batso to the boiler tubes is arranged between the vtube banks insuchya thatit will Y.causethe gasespwhich 'rise upwardly at the-65 rear end yof thecombustion chamber .to flow y forwardly, longitudinally of .the tubes of the lower bank and then Aupwardly.*throughthe -irst Lip-pass formed by the front wall of the boiler and by theiront baille l. 'After reach 70 ing the upper lend o't'fthe first :up-'pass the gasesv "1C-low downwardly and'v rearwardly through the second pass lformed by the 'front batlie' il' and the middle baille 3, then vupf wardly andrearwairdly through ithe third '.75 'l pass i'ormed bythefmiddlefbale 3 vand the lrear @battle 2,"1and thence Idownwardly and rearwardly through `thefourth pass to vthe gas outlet flueC the rear endot the boiler which communicates with :the -:lowerlend of'SO` the fourth pass.. The baiiie fwhi'ch, v.tor convenience; I'svill'lrefer =to as an upwardly inclined,v horizontal baillein .distinction-.to Itheupright crossbaitles'-1,2 and "3rtl1at.ex tend transversely 'of the tubesfo't the up-l 85- p'cr bank,-isprovidedy at its rear end with v a downwardlylinclined portion` 6 seas to not ,obstructthe inlet y end lof the A gas lout- '.let flue C', andsai'dfbatfle 5 .islprovide'd'at fits front end witlrlan upwardly-incl ined por-f' 90 y tion 7` that connects the baille '5 withthel'ront crossIl baffle 1 and which is disposed at such an angle that the gases Vwhich contact with the underside of thebaitle will hug the up'-y Vwardly-inclined portion 7, in making the up; i 95 "i i ward turn into the first up-pass, thereby preventing a gas pocket from being created in l Vthe vlirstup-pass that retards the upward flow: of the gases.

Due to the tact that the gas outlet Hue C 10o is arranged atthe rear end .ot the boiler and Y leads from the space betweeirthe= upper and` lowertube banks, it ispossible to make the combustion chamber B `of theY boiler very large. In factpinthe boiler herein illustrated 105 v i the upper portion of the combustion cham? ber increases in height from'the front to the f rear of the boilergandY it'extends substantially the `entire depth and widthl 'of the boiler,v lthereby causing the tubes'iof the lowerr ,"110

bank A to be subjected to radiant heat throughout their entire length. In addition to having an exceptionally large combustion chamber, my improved boiler Vis provided with a tortuous gaspassagewaywhich is of sufficient length toinsure the gases being effectively cooled, in traveling from thecombustion Vchamber to the gas outlet, said gas passageway being formed by three transversely-disposed bailles in the upper tube baliie 5, in traveling forwardly from the rear f .end of the combustion chamber to thelirst upwardpass. The portion oi the top side of the baille 5 that is arranged between the upright cross baies l and 2 in t-he upper bank acts as ythe floor of a dust hopper, and

one'ot' the sidewalls ofsaid dust hopper is provided with a door 8 that can be opened when it becomes necessary to remove the dust, soot and the like thathas accumulated on the top side of the balile 5.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: 1

l. A steam boiler, comprising superimposed banks of water tubes that project rearwardly and upwardly from the front wallV of the boiler setting, a combustion chamber whoseupper portion extends' substantially the full length of the boiler so-as to cause the tubes of the bottom bankto be subjected to radiant heat throughout substantially their entire length, a gas outlet at the rear end of the boiler leading from the spacebes arranged over the rear end1 portionl of the t combustion chamber, and a plurality of transverse upright baffles in the upper tube bank disposed in such relation to each other and toY the front Yand rear walls of the boiler sett-ing as to form a rstv up-pass contracted at its upper end, a final down-pass co-ntracted at its lower end, and ak plurality of intermediate passes.

2. A; steam boiler, comprising superimposed banks of water tubes that project rearwardly andv upwardly from the r'ontfwall of the boiler setting, a combustion chamber whose upper port-ion extendsy substantially the full length ot' the boiler so as to cause the tubes of the lower bank to be subjected tov radiant heat throughout substantially their entire length, a gas outlet yat the rear end of the boiler leading from the space between said banks, a transversely-disposed baille in the space between said'tube banks disposed substantially parallel to same and arranged over the rear end portion of thecombust-ion chamber, al front baffle in the upper bank arranged transversely of same and disposed at Asuch an angle to the front wall of the boiler setting as to l'orm a first upnpass contracted at its upper end, an inclined baliie portion connectingthe lower end ofvsaid lirst balfle with the baille between `the tube banks, a

rear battle in the upperbank arranged transversely of same and disposed at such an angle to therearwall of the boiler setting as to .form a final down-passA contracted `in ,its

llower end, and an intermediate bailleV projecting downwardly -from th-e top 'of the boiler settinginto said upper bank and terminating at a point above thelower side of said upper bank.

WALTER SIEGERIST. 'i 

